Which to use
“buffer” is a noun and “buller” is a verb - they look or sound alike but fill different roles in a sentence.
- #9,856
- “buffer” frequency rank
- #48,640
- “buller” frequency rank
- 58496
- confusion score
Side-by-Side Comparison
| Feature | buffer | buller |
|---|---|---|
| Definition | Someone or something that buffs (polishes and makes shiny). | To boil or seethe. |
Where the eye mixes buffer and buller
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Visual trap between buffer and buller
These two trip readers on the page rather than in the ear: buffer is /ˈbʌfə(ɹ)/ while buller is /ˈbʊlə(ɹ)/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 58496, derived from the frequency rank of both members and their visual similarity.
buffer is recorded at frequency rank #9,856, classified as anoun, pronounced /ˈbʌfə(ɹ)/. buller is at rank #48,640, tagged as averb, pronounced /ˈbʊlə(ɹ)/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 58496, this pair ranks #112,167 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of buffer vs buller
Shared letters: beru. Private to "buffer": f. Private to "buller": l.
"buffer" · 6 letters · shape CVCCVC · "buller" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "buffer" for "buller" ever safe?
Frequency check: "buffer" vs "buller" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "buffer" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "buller" - compare definitions side by side with the headword page. Word entry
- This pair ranks #112,167 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "buffer" and "buller" also get mixed up with nearby pairs, the highest-scored neighbour is "bulger vs buller". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #112,167 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.